Great title choice, great imagery and insight. I thought the story couldn't get any better with the unabashed food porn of the first paragraph, but then you wallop me:
"If she is a vampire in everything except her unyielding compassion, if that is why she has learned to crave the taste of sweets instead of human blood."
That's so Tsuzuki (female or male), sensuality meeting sadness in a butterfly knot.